Yeah... I had indoor/outdoor cats as a kid. There's nothing quite like the experience of stepping into mouse guts barefoot to make you a fan of inside-only cats and a strict no eating the mousies policy.

>.<'

Edit: It occurs to me that I could NOT have picked a better avatar to wear for this discussion.

Ours was an indoor cat (declawed before we got her), and the mouse was killed pretty cleanly-- one bite through the neck and left outside my parents' bedroom as a present. Seeing as how that's the only kind of mouse my mom likes, the cat got some treats that morning.